性别不会影响身体组成的变化和胰岛素样生长因子-I在美国陆军基本战斗训练期间
Brandon M Roberts1, Jeffery S Staab1, Aaron R Caldwell2
1Military Performance Division, US Army Research of Environmental Medicine, Natick, Massachusetts.
Journal of strength and conditioning research
|February 6, 2024
概括
美国陆军基本战斗训练 (BCT) 期间胰岛素类生长因子1 (IGF-I) 的变化与身体成分变化有很弱的相关性. 仅IGF-I本身并不是预测学员身体组成变化的可靠生物标志物.
科学领域:
- 运动生理学 运动生理学
- 内分泌学 在内分泌学.
- 人类表现的人类表现.
背景情况:
- 胰岛素类生长因子1 (IGF-I) 被公认为健康和身体组成的生物标志物.
- 在强度训练期间,身体组成变化与IGF-I水平之间的关联尚未得到充分理解.
研究的目的:
- 为了研究身体组成 (瘦体和脂肪体) 和总血清IGF-I水平的变化之间的关系.
- 为了检查这些关系在一个大队的男性和女性美国陆军基本战斗训练 (BCT) 的新兵.
主要方法:
- 双能量X射线吸收计 (DXA) 用于测量身体成分.
- 在BCT的开始 (1周) 和结束 (9周) 测量了总血清IGF-I水平.
- 分析了部分相关性,以评估关联,同时控制其他变量.
主要成果:
- 身体质量,体重指数,体脂百分比和脂肪质量在BCT期间下降,而瘦肉质量在BCT期间增加 (所有p < 0.001).
- 从BCT前 (176 ± 50 ng·ml−1) 到BCT后 (200 ± 50 ng·ml−1,p < 0.001) 的平均IGF-I水平显著增加.
- 在BCT期间IGF-I的增加与瘦肉量 (r = 0.0769,p = 0.023) 和脂肪量 (r = 0.1055,p < 0.001) 的增加有微弱的关联,没有性别差异.
结论:
- 虽然IGF-I的变化与BCT期间的身体组成变化有很弱的相关性,但IGF-I单独作为预测这些变化的生物标志物是不够的.
- 这些发现表明,性别不会影响BCT期间观察到的身体组成或IGF-I水平的变化.
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